Water Awards

West Yost developed a dynamic hydraulic model for the City of Corvallis’ water distribution system. The new model incorporates GIS, geocodes customer billing data to allocate water demand, and was calibrated using an innovative and highly effective tracer analysis.

The dynamic water model was used to optimize water system operations, refine water quality monitoring programs, and will guide future water system expansions and development. West Yost also provided City staff with “hands-on” training and technical support in the use of the dynamic hydraulic model.

West Yost provided planning, design, and construction management for the Ophir Road Pump Station. This pump station constructed about a mile upstream and 210 feet above the Auburn Tunnel outlet, allows Placer County Water Agency (PCWA) to pump water from the tunnel for municipal and agricultural use. It is designed to pump 332 cfs of water through three distinct pump stations, housing 11 vertical turbine pumps ranging in size from 200- to 600-hp.

West Yost designed a new 4-MG potable water storage tank and booster pump station for the City of Davis. Project components included a prestressed concrete tank, pump station building, chlorination facilities, perimeter fencing, landscaping, offsite utilities, and SCADA. Related issues included locating a potential cell tower on the tank site and providing for future delivery of treated surface water to the water storage tank.

The Woodland Davis Clean Water Agency (Agency) and the City, in conjunction with West Yost, conducted an evaluation of ASR as a component of the overall water supply for the Davis Woodland Water Supply Project (DWWSP), designed the first ASR facility for the City, completed construction of the project, and have recently begun injection testing for the ASR well.

West Yost prepared a Water Supply Master Plan using an integrated approach for water supply planning that addresses demand management, supply management, and infrastructure master planning. This project involves ongoing coordination with the City’s advisory committee to hear and comment on the plan at each stage of development, from analysis of demands and projections regarding future conservation to development of modeling scenarios and recommendations.

West Yost provided the predesign, design, and construction management and inspection for a partially buried, 3 MG potable water concrete storage tank and a 6,000 gpm booster pump station located in the City’s David Douglass Park.

The objective of Roseville’s Aquifer Storage and Recovery (ASR) Program is to store surplus drinking water (10,000 acre-feet per year) in the underlying aquifer during periods of normal and above normal precipitation. This stored drinking water is then extracted and served to meet peak demands. West Yost provided design and construction management services for two ASR wells for the City.

The Davis Woodland Water Supply Project (DWWSP) is one of the largest and most complex water supply projects to be contracted via alternative delivery in California. For two decades, West Yost has assisted the cities of Davis and Woodland with technical feasibility studies, analyses of alternatives to meet their community needs. West Yost has served as the lead engineering firm for the initial planning efforts, water rights acquisition, technical studies, program development, and ultimately as the Owner’s Representative for the Design-Build-Operate (DBO) contract procurement.